Radioantenna



Feb. 16 1926; 1,573,171

' F. R KRCNFOTH RADI QANTENNA Filed Feb. 12, 1925 I 3% @MM Glitch-V21:

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FRANK RQBEBT I'ZRONFOTH,

ST? ES 0:3 AI 'ISTEFUDAIVI, HEW YORK.

RADIGAEFTTENNA.

Application. filed February 12, 1925.

To all whom it may concern:

Be it known that I, FRANK Bonnier KRON- rorri, a. citizen of the UnitedStates, residing at Amsterdam, in he county of lilontgomery and State ofNew York, have invented certain new and useful Improvements in altadioantenna, of which the following is a specification.

The p esent invention relates to antennae particularly designed forradio receiving sets and aims to provide a device which increases theca' acity of the straight wire antennae which now commonly used on housetops and the like by radio broadcast fans in their receiving sets. Theaerial is designed for use where the space for stretching the antennawire is comparatively small.

The invention further aims to provide a device of this nature which willclarify the radio frequency waves so as to in'iput the maximum energyinto the antenna circuit of the receiving set.

A still further very important object of the invention is to provide asupporting structure in combination with an antenna which willcompensate for the contraction and expansion of the antenna wire causedby the change in temperatures so that sale wire will be n'iaintainedin asubstantially taut condition at all times.

A still furl-her object of the invention is to provide an antennastructure which is simple, cllicient, strong, d ble, inexpensive tomanufacture, and otherwise well adapted to the purpose for which it isdesigned.

With the above and numerous other objects in view as will appear as thedescription proceeds, the invention resides in certain novel features ofconstruction, and in the combination and arrangement of parts as will behereinafter more fully described and claimed.

In the drawing Figure 1 is an elevation of the antennae embodying thefeatures of my invention, and

Figure 2 is a perspective view of one end thereof.

Referring to the drawing in detail it will Serial No. 8,?67.

be seen that l and 2 represent posts or other like 'upport having hooks3 thereon. An insulator is enga ed with one hook and another insulator ois engaged on a cable 6 t -ined over a roller '4' supported in the i no8 engaged with the hook 3 on post 1. This ca /file at its end may befastened to the bottom of post 1 by any suitable means as at A pair ofsteel discs it) are provided with central openings for receiving eyebolts 11. Each disc 10 is provided with a series of apertures 12 whichare arranged in pairs. In the present instance there are four pairs ofthese apertures on each disc arranged at er ual intervalsthereaboutadjacent the edg Guy wires 13 are passed through the apertures12. These guy wires are in the form of loops and are engaged with theinsulators l and 5. The main antenna wire ll is attached to the eyebolts 11 and the cable 6 is then pulled so as to cause the loop guys 13and the main antenna wire i l to become taut so as to talre the positionshown in Figure 1. ll hen the cable 6 is pulled tightl v the discs 10will be flexed to some extent so that if the wire expands these discs,bee-are of their resilient nature will still maintain the wire taut, andif the wire contracts because of the heat, these discs 10 will flex;further so as to take an excessive strain off the antenna wire. From theabove it will be see have provide that I d an antenna which will provide,ater capacitance than is possible with a sing e strand of wire andwhich this main antenna wire will-be maintained in a relatively tautposition at all times under ordinary circumstances. It will also be seenthat the antenna of this nature will clarify the signal.

It is apparent that the present embodiment of the invention which I havedescribed by way of example attains all th features of advantageenumerated as desirable in the statement of the invention and the abovedescription and that numerous changes in the details of construction,and in the combination and arrangement of parts may be i L; L L

resorted to Without departing from the spirit or scope of the inventionas hereinafter claimed.

Having; thus described the invention what I claim is:

In an antenna structure, a pair of discs, each disc provided with acentral opening and a plurality of apertures adjacent its periphery, eyebolts in the central openings, a Wire having its ends attached to theeye bolts, a pair of insulators, guy Wires passing through the aperturesof the discs and engaged with the insulators.

In testimony whereof I afiix my signature.

FRANK ROBERT KRONFOTI-I.

